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US2037972A
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Cinematograph apparatus
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GB410434A
|
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Improvements in or relating to flexible couplings
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GB421224A
|
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Improvements in or relating to combined cinematograph and sound reproducing apparatus
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GB408533A
|
|
Improvements in or relating to apparatus for recording or reproducing sound on or from films
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US1957540A
|
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Apparatus for reading sound on cinematograph sound films
|
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GB405496A
|
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Improvements in or relating to apparatus for reproducing sound recorded on photographic sound films
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GB400855A
|
|
Improvements in or relating to apparatus for reproducing sound recorded on cinematograph sound films
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US1954876A
|
|
Mounting of objectives for use with cinematographs and like projectors
|
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GB397418A
|
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Improvements in or relating to the mounting of objectives for use with cinematograph and like projectors
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